Ch 14 Crossword

1. ________-source pollution comes from distinct locations.
3. Large lakes that store water for human use.
6. The practice of watering plants and crops that uses less water.
7. Nutrient pollution in oceans can cause _______ tide.
9. Sponge-like formations of rock, sand, or gravel that hold water.
10. A ________ includes all of the land area that supplies water to a particular river system.
12. The process of making fresh water from sea water by removing its salt content.
13. ________ water is water that is relatively pure with few dissolved salts.
14. _______-source pollution comes from many places spread over a large area.

1. _________ layers contain spaces through which water can pass through.
2. A ______ system is a network of connected streams and rivers.
4. The _________ zone is any area where surface water soaks into the ground and reaches an aquifer.
5. Water that flows over land and hasn’t been absorbed into the ground.
8. Water ___________ is the process of moving water from its source to places where humans live.
11. A _______ is any obstruction placed in a river or stream to block water flow.